Both orthokeratology and atropine eye drops are effective methods for myopia control, but few studies have compared them all together simultaneously. Therefore, the primary aim of the present study was to compare the effect of orthokeratology versus low-dose (0.01% and 0.02%) atropine on the control of myopia progression.

Inclusion Criteria:

Best corrected visual acuity less then 0.00 log MAR (minimum angle of resolution) units Cycloplegic SER of - 1.0 D or less in both eyes. An inter-eye cycloplegic SER difference of 1.00 D or more.

Exclusion Criteria:

Children with cycloplegic cylinder refraction of more than + 1.00 D or less than - 1.00 D.

History of binocular vision problems, including strabismus. History of known ocular disorders, including media opacities, macular dysgenesis, optic nerve hypoplasia, perinatal brain injury, buphthalmos, and retinopathy of prematurity.

History of medication use that might have affected the refractive results. Systemic or developmental problems that might have hindered refractive development.